Acta Univ. Agric. Silvic. Mendelianae Brun. 2011, 59(6), 281-290 | DOI: 10.11118/actaun201159060281

Growth of sterlet Acipenser ruthenus under experimental and farm conditions of the Czech Republic, with remarks on other sturgeons

Miroslav Prokeš1, Vlastimil Baruš1,2, Jan Mareš3, Milan Peňáz1, Vít Baránek4
1 Ústav biologie obratlovců AV ČR, v. v. i., Květná 8, 603 65 Brno, Česká republika
2 Katedra zoologie a rybářství, Česká zemědělská univerzita v Praze, Kamýcká 129, 165 21 Praha 6, Česká republika
3 Ústav zoologie, rybářství, hydrobiologie a včelařství, Mendelova univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika
4 Povodí Moravy, s. p., Dřevařská 11, 601 75 Brno, Česká republika

Growth rate of sterlet (Acipenser ruthenus) juveniles and adults was studied and compared with other sturgeon species under experimental and farm conditions in the Czech Republic. During the juvenile development (0+ to 5+) the specific growth rate (SGR) decreased successively from 17.67 to 0.05 %.d-1. During the adult period of development (6+ to 13+), the SGR fluctuated from 0.0191 to 0.0562, mean = 0.0410 %.d-1. In addition, body weight condition and length-weight relationship are presented. The adult period commenced at average age from 4 to 5 years. At the end of subsequent 13 years of life (1st-13th), following values of TL/w (in mm/g) in reared sterlet were determined: 250/53, 350/174, 400/250, 440/320, 465/400, 490/462, 516/525, 546/645, 561/720, 596/860, 610/1014, 625/1199, 660/1456. A very fast growth intensity was determined in the young sterlet (1st and 2nd year) while it decreased in the older fish. Growth intensity of other reared greater sturgeon species (Huso huso, Polyodon spathula, A. gueldenstaedtii, A baerii, A. stellatus), compared with sterlet in early juvenile period of ontogeny, were mainly higher.

Keywords: sterlet juveniles and adults, specific growth rate, length-weight relationship, condition factor
Grants and funding:

This article has been elaborated by means of subsidiary financial sources of the Czech Ministry of Agriculture (NAZV, grant project No. QH 71305) and by Research Projects of the Faculty of Agronomy, Mendel University in Brno (No. MSM 6215648905) and of the Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences in Prague (No. MSM6046070901).

Received: September 27, 2011; Published: March 16, 2014  Show citation

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Prokeš, M., Baruš, V., Mareš, J., Peňáz, M., & Baránek, V. (2011). Growth of sterlet Acipenser ruthenus under experimental and farm conditions of the Czech Republic, with remarks on other sturgeons. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis59(6), 281-290. doi: 10.11118/actaun201159060281
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References

  1. ADÁMEK, Z., PROKEŠ, M., BARUŠ, V. & SUKOP, I., 2007: Diet and growth of 1+ Siberian sturgeon, Acipenser baerii in alternative pond culture. Turkish Journal of Fisheries and Aquatic Sciences 7: 153-160.
  2. AMBROZ, A. I., 1972: Sterlyad' Kilijskogo rukava Dunaya [Sterlet of the Danube Kim arm]. Trudy CNIORKH, 1972, 4: 158-171 (in Russian).
  3. BARÁNEK, V., PROKEŠ, M., BARUŠ, V., PEŇÁZ, M., MAREŠ, J., SPURNÝ, P. & NĚMEC, R., 2004: Růst jesetera malého (Acipenser ruthenus) v podmínkách Rybníkářství Pohořelice [Growth of sterlet (Acipenser ruthenus) under conditions of Fishery Unit Pohořelice]. In: Spurný, P. (ed.), Sb. 55 let výuky rybářské specializace na MZLU v Brně. ÚRH MZLU v Brně, Brno 2004, pp. 119-127, ISBN 80-7157-810-X.
  4. BARÁNEK, V., PROKEŠ, M., BARUŠ, V., PEŇÁZ, M., CILEČEK, M., MAREŠ, J., JIRÁSEK, J. & SPURNÝ, P. 2006: Srovnání růstu juvenilního (1+) jesetera malého (Acipenser ruthenus) při použití experimentální a komerční diety [Growth comparison of the 1+ juvenile sterlet (Acipenser ruthenus) by using experimental and commercial diet]. In: Vykusová, B. (ed.), Sb. IX. česká ichtyologická konference. Jihočeská univerzita v Českých Budějovicích, Výzkumný ústav rybářský a hydrobiologický ve Vodňanech. Vodňany 2006, pp. 8-11, ISBN 80-85887-57-6.
  5. BARUŠ, V., OLIVA, O. (eds.) et al., 1995: Fauna ČR a SR, sv. 28/1,2. Mihulovci - Petromyzontes a ryby - Osteichthyes (1, 2) [Fauna of the Czech and the Slovak Republics, Vol. 28/1, 2. Lampreys Petromyzontes and fishes Osteichthyes (1,2)]. Academia Praha, 623 and 698 pp., ISBN 80-200-0501-3.
  6. BERG, L. S., 1948: Ryby presnykh vod SSSR i sopredel'nykh stran, chast I [Freshwater fishes of USSR and adjacent countries, part I]. Izd. AN SSSR, Moskva - Leningrad 1948, 467 pp. (in Russian).
  7. BLOESCH, J., JONES, T., REINARTZ, R., STRIEBEL, B., HOLČÍK, J., KYNARD, B., SUCIU, R., WILLIOT, P. (eds.), 2006: Action plan for the conservation of sturgeons (Acipenseridae) in the Danube River Basin. Council of Europe; Nature and Environment No. 144, 1-199, ISBN-10: 92-871-5992-0.
  8. FLAJŠHANS, M., LINHART, O., ŠLECHTOVÁ, V. & ŠLECHTA, V., 1999: Genetic resources of commercially important fish species in the Czech Republic: present state and future strategy. Aquaculture 173 (1-4): 471-483. DOI: 10.1016/S0044-8486(98)00477-3 Go to original source...
  9. FRANTSUZOV, N. I., 1958: Materialy k biologii sterlyadi Tsimlyanskogo vodokhranilishcha [Materials to the biology of sterlet in the Tsimlyansk Reservoir]. Izvestiya VNIORKH, 45: 213-225 (in Russian).
  10. GELA, D., RODINA, M. & LINHART, O., 2008: Řízená reprodukce jeseterů [The artificial reproduction of the sturgeons (Acipenser)]. Methodology edition (Technology Series), Research Institute of Fish Culture and Hydrobiology University of South Bohemia, Vodňany, No. 78, 24. pp, ISBN 978-80-85887-62-4.
  11. GERSHANOVICH, A. D., PEGASOV, V. A. & SHATUNOVSKIY, M. I., 1987: Ekologiya i fiziologiya molodi osetrovykh [Ecology and physiology of sturgeon fry]. Agropromizdat' Moscow 1987, 215 pp. (in Russian).
  12. HANEL, L. & LUSK, S., 2005: Ryby a mihule České republiky: rozšíření a ochrana [Fishes and lampreys of the Czech Republic: distribution and conservation]. Český svaz ochránců přírody, Vlašim, 2005, 407 pp., ISBN 80-86327-49-3.
  13. HOHAUSOVÁ, E., KLÍVAR, D. & PROKEŠ, M. 1996: Růst larev a juvenilních jedinců 0+ vyzy velké (Huso huso) v akvakulturních podmínkách České republiky [Growth of larvae and 0+ juveniles of Giant sturgeon (Huso huso) under aquaculture conditions of the Czech Republic]. In: Kozák, P., Hamáčková, J. (eds.), Sb. 2. Česká ichtyologické konference, VÚRH JU Vodňany 1996, pp. 151-155, ISBN 80-85887-05-3.
  14. HOCHLEITHNER, M., 1993: Early growth of different sturgeon species (Acipenseridae) under aquaculture conditions. In: Abstract Bulletin - International Symposium on Sturgeons. Moscow, VNIRO, pp. 72-73.
  15. HOCHLEITHNER, M., GESSNER, J. & PODUSHKA, S., 1999: The bibliography of Acipenseriformes. Aqua Tech Publications, Kitzbuehel, Austria, 1-490, ISBN 3-9500968-1-7.
  16. HOLČÍK, J. (ed.), 1989: The freshwater fishes of Europe. General introduction to fishes. Acipenseriformes. Vol. 1, Part II, AULA - Verlag Wiesbaden, 469 pp.
  17. HOLČÍK, J., KLINDOVÁ, A., MASÁR, J. & MÉSZÁROS, J., 2006: Sturgeons in the Slovakian rivers of the Danube River basin: an overview of their current status and proposal for their conservation and restoration. J. Appl. Ichthyol. 22 (Suppl. 1) (2006): 17-22. DOI: 10.1111/j.1439-0426.2007.00924.x Go to original source...
  18. IOGANZEN, B. G., 1946: Sterlyad' bassejna reki Obi [Sterlet of the Ob river drainage area]. Trudy Tomskogo gos. univ. 97: 151-182 (citation after Pavlov & Mochek 2006) (in Russian).
  19. JANKOVIČ, D., 1958: Ekologia dunavske kečige (Acipenser ruthenus L.) [Ecology of sterlet (Acipenser ruthenus L.]. Biol Indy. N. Srbije, Posebna izdanja, 2: 1-145 (in Serbian).
  20. JÄHNICHEN, K., KOHLMANN, K. & RENNERT, B., 1999: Juvenile growth of Acipenser ruthenus and 4 different sturgeon hybrids. J. Appl. Ichtyol. 15 (1999): 248-249. DOI: 10.1111/j.1439-0426.1999.tb00244.x Go to original source...
  21. JEITTELES, L. H., 1864: Die Fische der March bei Olmütz. II. Abteilung. Jahres- Bericht über das kaiserl. königl. Gymnasium in Olmütz während des Schuljahres 1863-1864, 3-26 (in German).
  22. JIRÁSEK, J., SPURNÝ, P., MAREŠ, J., ONDRA, R., PEŇÁZ, M., BARUŠ, V. & PROKEŠ, M., 1997: Biologické a technologické aspekty intenzivního chovu jeseterů v podmínkách České republiky [Biological and ecological aspects of fry sturgeons intensive rearing under conditions of the Czech Republic]. Závěrečná zpráva o řešení grantového projektu GA ČR č. 509/94/0345. MZLU v Brně a ÚEK AV ČR v Brně, pp. 1-143.
  23. KALMYKOV, V. A., RUBAN, G. I. & PAVLOV, D. S., 2009: On the populational structure of sterlet Acipenser ruthenus (Acipenseridae) from the Volga lower reaches. Journal of Ichthyology, 49(4): 339-347. DOI: 10.1134/S0032945209040067 Go to original source...
  24. KLÍVAR, D., 1996: Růst plůdku jesetera hvězdnatého (Acipenser stellatus) v akvakulturním chovu [Growth of Stellate sturgeon (Acipenser stellatus) fry in aquaculture]. In: Kozák, P., Hamáčková, J. (eds.), Sb. 2. Česká ichtyologická konference. VÚRH JU Vodňany 1996, pp. 156-161, ISBN 80-85887-05-3.
  25. KOLMAN, R., 1999: Jesiotry [Sturgeons]. Wydawnictwo IRŠ, Olsztyn 1999, 136 pp., PL ISBN 83-87506-06-0 (in Polish).
  26. KOVÁČ, V., 1997: Age and growth of sterlet (Acipenser ruthenus L.) from the middle Danube. Acta Zool. Univ. Comenianae, Vol. 41: 39-42.
  27. KOVRIŽNYCH, J. A., 1988: Age and growth of the sterlet (Acipenser ruthenus Linnaeus, 1758) in the Czechoslovak stretch of the Danube. Práce Úst. Rybár. Hydrobiol. Bratislava, 6: 101-114.
  28. KRUPKA, I., MASÁR, J. & TURANSKÝ, R., 2000: Raný vývoj jesetera malého (Acipenser ruthenus Linnaeus, 1758) [Early ontogeny of sterlet (Acipenser ruthenus Linnaeus, 1758)]. Pol'nohospodárstvo 46(5): 387-399 (in Slovak, with English abstract).
  29. KURFIRST, J., KERBER, P. & KALOUS, L., 2000: Růst jesetera sibiřského (Acipenser baerii) v podmínkách České republiky [Growth of Siberian sturgeon (Acipenser baerii) under conditions of the Czech Republic]. Czech J. Anim. Sci. 45, 2000: 545-552.
  30. KUX, Z., 1956: Příspěvek k ichtyofauně dolní Moravy a Dyje [Contribution to ichthyofauna of the lower Morava and Dyje]. Acta Musei Moraviae, 41: 93-112.
  31. LENHARDT, M., PROKEŠ, M., JARIC, I. Z., BARUŠ, V., KOLAREVIC, J., KRUPKA, I., CVIJANOVIC, G., CAKIC, P. & GACIC, Z., 2004: Comparative analysis of morphometric characters of juvenile sterlet Acipenser ruthenus L. from natural population and aquaculture. Journal of Fish Biology (2004) 65 (Supplement A): 320. DOI: 10.1111/j.0022-1112.2004.0559o.x Go to original source...
  32. LINHART, O., DZYUBA, B., BORYSHPOLETS, S. & RODINA, M., 2010: Mražené sperma jesetera malého [Freezing sperm of sterlet (Acipenser ruthenus)]. Methodology edition (Technology Series), Research Institute of Fish Culture and Hydrobiology, Faculty of Fisheries and Protection of Waters, University of South Bohemia, Vodňany, No. 101, 20 pp.
  33. LUKIN, A. V., KUZNETSOV, V. A., KHALITOV, N. CH., DANILOV, N. N., TIKHONOV, K. P. & MELENTIEVA, R. R., 1981: Sterlyaď Kujbyshevskogo vodokhranilishcha i puti ee prisposobleniya k novomu sushchestvovaniyu [Sterlet of the Kujbyshevsk Reservoir and the ways of her adaptation to new existence]. Izd. Kazanskogo Univ., Kazan' (in Russian).
  34. LUSK, S., 1992: Význam umělé reprodukce pro zachování existence životaschopných populací říčních druhů ryb [Importance of the artificial reproduction for conservation of viable riverine fish species populations]. In: Adámek, Z. & Flajšhans, M. (eds.), Sb. Reprodukce ryb '92. Výzkumný ústav rybářský a hydrobiologický, Vodňany, ČSFR, pp. 173-176, ISBN 80-901087-2-5.
  35. LUSK, S., LUSKOVÁ, V., HANEL, L., LOJKÁSEK, B. & HARTVICH, P., 2010: The red list of lampreys and fishes of the Czech Republic - version 2010. In: Lusk, S. & Lusková, V. (eds.), Biodiversity of fishes of the Czech Republic (VIII). Institute of Vertebrate Biology AS CR, v.v.i., Brno, pp. 68-78, ISBN 978-80-87189-08-5.
  36. MAHEN, J., 1927: Částečná revize ryb Dunajské oblasti [Partial revision of fish in the Danubian areas]. Zvl. otisk ze sborníku Klubu přírodovědeckého v Brně, 9, pp. 1-16.
  37. MÉSZÁROS, J., KOHÚT, J., JANOUŠOVÁ, M., VITEK, J. & HUSZÁR, R., 2004: Niektoré aspekty technológie umelého odchovu plôdika jesetera malého na Slovensku [Some technological aspects of artificial breeding of sterlet in Slovakia]. In: Spurný, P. (ed.), Sb. 55 let výuky rybářské specializace na MZLU v Brně. Brno 2004, pp. 85-89, ISBN 80-7157-810-X.
  38. MUSATOV, A. P., 1964: O rasach i roste sterlyadi r. Oki [About of strains and growth of sterlet in the Oka River]. Trudy molodykh uchenykh VNIRO. Izd. Pishchevaia promyshlenost, Moskva, pp. 58-65 (in Russian).
  39. NAPORA-RUTKOWSKI, L., KAMASZEWSKI, M., BIELAWSKI, W., OSTASZEWSKA, T. & WEGNER, A., 2009: Effects of starter diets on pancreatic enzyme activity in juvenile sterlet (Acipenser ruthenus). The Israeli Journal of Aquaculture - Bamidgeh 61(2): 143-150. Go to original source...
  40. OSTROUMOV, A. A. & OGURTSOV, V. M., 1954: O dvukh formakh sterlyadi [About of two sterlet forms]. Biulten' MOIP, otdel biologicheskiy 59, pp. 37-39 (in Russian).
  41. PAVLOV, D. S. & MOCHEK, A. D. (eds.), 2006: Ekologiya ryb Ob'-Irtyshskogo basseina [Ecology of fish in the Ob-Irtysh drainage basin]. Rossiyskaya akademia nauk, Tovarichestvo nauchnykh izdaniy KMK, Moskva 2006, 596 pp. (in Russian).
  42. PETKEVICH, A. N., 1956: K biologii migruiushchikh ryb srednei i verchnei Obi [Biology of migrated fish in the middle and upper section of the Ob River]. Tr. Barabinskogo otd. VNIORKH, 6(1): 54-67 (citation after Pavlov & Mochek 2006) (in Russian).
  43. PROKEŠ, M., BARUŠ, V. & PEŇÁZ, M., 1996: Growth of larvae and juveniles 0+ of Siberian sturgeon (Acipenser baerii) in aquaculture and experimental conditions of the Czech Republic. Folia Zool., 45(3): 259-270.
  44. PROKEŠ, M., BARUŠ, V. & PEŇÁZ, M., 1997a: Comparative growth of juvenile sterlet (Acipenser ruthenus) and Siberian sturgeon (A. baerii) under identical experimental conditions. Folia Zool., 46(2): 163-175.
  45. PROKEŠ, M., BARUŠ, V. & PEŇÁZ, M., 1997b: Growth of 0+ juveniles Russian sturgeon (Acipenser gueldenstaedti) in experimental basin conditions (Czech Republic). Folia Zool., 46(4): 337-351.
  46. PROKEŠ, M., BARUŠ, V. & PEŇÁZ, M., 2000a: Akvakulturní chov jeseterů v České republice [Aquaculture of sturgeons in the Czech Republic]. In: Mikešová J. (ed.), Sb. referátů ze IV. české ichtyologické konference. Vodňany 2000. Jihočeská univerzita v Českých Budějovicích a VÚRH ve Vodňanech, pp. 140-143, ISBN 80-85887-32-0.
  47. PROKEŠ, M., BARUŠ, V. & PEŇÁZ, M., 2000b: Morfometrická a růstová rozmanitost u druhů jeseterů chovaných v České republice v letech 1994-1999 [Morphometry and growth variety of sturgeon species reared in the Czech Republic in 1994-1999]. In: Lusk S. & Halačka K. (eds.), Biodiversity of fishes of the Czech Republic (III). Institute of Vertebrate Biology, AS CR, Brno, pp. 131-138, ISBN 80-238-5659-6.
  48. PROKEŠ, M., BARUŠ, V., PEŇÁZ, M. & BARÁNEK, V., 2003a: Růstové vlastnosti a problematika chovu jesetera sibiřského (Acipenser baerii) v podmínkách České republiky [Growth rate and rearing problems of Siberian sturgeon under conditions of the Czech Republic]. Bulletin VÚRH Vodňany, 2003: 99-103, ISSN 0007-389X.
  49. PROKEŠ, M., BARUŠ, V., PEŇÁZ, M., BARÁNEK, V., OŠANEC, J. & ŠUTOVSKÝ, I. 2003b: Biometrie a růst jesetera malého (Acipenser ruthenus) v České republice [Biometry and growth rate of the sterlet (Acipenser ruthenus) in the Czech Republic]. In: Švátora, M. (ed.), Sb. VI. česká ichtyologická konference. Praha 2003, pp. 81-86.
  50. PROKEŠ, M., BARUŠ, V., PEŇÁZ, M., JIRÁSEK, J. & MAREŠ, J., 1997c: Growth of juvenile Siberian sturgeon (Acipenser baerii) fed two types of pelleted feed under trough farming conditions. Czech J. Anim. Sci., 42: 501-510.
  51. REINARTZ, R., LIPPOLD, S., LIECKFELDT, D., LUDWIG, A., 2011: Population genetic analyses of Acipenser ruthenus as a prerequisite for the conservation of the uppermost Danube population. J. Appl. Ichthyol. 27(2011): 477-483. DOI: 10.1111/j.1439-0426.2011.01693.x Go to original source...
  52. RONYAI, A., RUTTKAY, A., VARADI, L. & PETERI, A., 1991: Growth comparative trial of fingerlings of sterlet (Acipenser ruthenus L.) and that of its hybrid with male Siberian sturgeon (Acipenser baerii B.). In: Williot P. (ed.), Acipenser, CEMAGREF Publ., 1991, pp. 417-421.
  53. ROSENTHAL, H., WEI, Q., CHANG, J., BRONZI, P., GESSNER, J., 2011: Conclusions and recommendations of the 6th Intenational Symposium on Sturgeons (Wuhan, China, October 2009). J. Appl. Ichthyol. 27(2011): 157-161. DOI: 10.1111/j.1439-0426.2011.01755.x Go to original source...
  54. RYBNIKÁR, J., PROKEŠ, M., MAREŠ, J. & CILEČEK, M., 2011: Early development and growth of sterlet (Acipenser ruthenus) in the Czech Republic. Acta Univ. Agric. et Silvic. Mendel. Brun., 2011(5): 217-225. DOI: 10.11118/actaun201159050217 Go to original source...
  55. SADOWSKI, J., TRZEBIATOWSKI, R. & WIELOPOLSKA, M., 2000: Growth rate comparisons between sterlet (Acipenser ruthenus) and Russian sturgeon (Acipenser gueldenstaedti) x Siberian sturgeon (Acipenser baerii) hybrid in heated water culture. Fol. Univ. Agric. Stetin. 205 Piscaria (26), Szczecin 2000, pp. 63-70.
  56. SETSKO, R. I., 1976a: Osetrovye i nel'ma Novosibirskogo vodokhranilishcha. Biologicheskiy rezhim i rybokhozyaystvennoe ispol'zovanie Novosibirskogo vodokhranilishcha [Sturgeons and nelma of the Novosibirsk Reservoir. Biological regime and fish production utilization]. Novosibirsk, Zapadno-sibirskoe kn. Izd., pp. 126-133 (citation after Pavlov & Mochek 2006) (in Russian).
  57. SETSKO, R. I., 1976b: Rybnoe khozyaystvo Novosibirskogo vodokhranilishcha. Biologicheskiy rezhim i rybokhozyaystvennoe ispol'zovanie Novosibirskogo vodokhranilishcha [Fishery management of the Novosibirsk Reservoir. Biological regime and fish production utilization]. Novosibirsk, Zapadno-sibirskoe kn. Izd.-vo, pp. 153-165 (citation after Pavlov & Mochek 2006) (in Russian).
  58. SHMIDTOV, A. I., 1939: Sterlyaď (Acipenser ruthenus L.) [Sterlet (Acipenser ruthenus)]. Uchenye zapisky Kazanskogo univ. 99 (4-6) - Zoologiya 6-7, pp. 3-279 (in Russian).
  59. SOKOLOV, L. I. & VASILYEV, V. P., 1989: Acipenser ruthenus Linnaeus 1758. In: Holčík J. (ed.): The freshwater fishes of Europe. Vol. I, Part II. General introduction to fishes Acipenseriformes. AULA-Verlag Wiesbaden, pp. 227-262.
  60. STEFFENS, W., JAHNICHEN, H. & FREDRICH, F., 1990: Possibilities of sturgeon culture in Central Europe. Aquaculture 1990, 89(2): 101-122. DOI: 10.1016/0044-8486(90)90303-5 Go to original source...
  61. STRÁŇAI, I., 1992: Rast jesetera malého s ohl'adom na dl'žku jeho rostra [Growth of sterlet with respect to the length of its rostrum]. In: Nagy, Š. (ed.), Sb. referátov z konferencie ichtyologickej sekcie SZS. Vydala IS SZS pri SAV, Bratislava 1992, pp. 39-46.
  62. WILLIOT, P, SABEAU, L., GESSNER, J., ARLATI, G., BRONZI, P., GULYAS, T. & BERNI, P., 2001: Sturgeon farming in Western Europe: Recent developments and perspectives. Aquat. Living Resour. 14(2001): 367-374. DOI: 10.1016/S0990-7440(01)01136-6 Go to original source...

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